Rotary pump or motor



/ Jan. 16, 1923.

R, N. TRANE.

ROTARY PUMP 0R MOTOR.

FILED FEB-14.1920.

2 SHEETSSHEET 1.

R/V. Trdn mm z.

' A TTORNEY8 Jan. 16, 1 923.

R. N. TRANE.

ROTARY PUMP 0R MOTOR.

FILED FEB-14,1920.

2 SHEETS SHEET 2.

ATTORNEYS Patented Jan. 16, 1923.

REUBEN N. TRANE, 0F LACROSSE, WISCONSIN.

ROTARY'PUMP on 11:01:03. I

Application filed'February 14, 1920. Serial No. 358,707.

To all whom it may concern:

Be it known that I. REUBEN N. TRANE, a

citizen of the United States, and a resident of La Crosse, in the county of La Cross-e and State of Wisconsin, have invented a new and useful Improvement in Rotary Pumps or Motors, of which the following is a full, clear,and exact description.

An objectof my invention is toprovide a pump which may be used for pumping liquids or gases, which is simple in'construction, but in which certain defects that are often found in rotary pumps and motors of this type are eliminated, such as excessive vibration and wear of the apparatus.

A further object of my invention is to provide a rotary pump which, unlike most of the pumps of the type, has. instead'of a line contact, surface contact of relatively considerable area. thereby obviating the. dis advantages which arise when the contacting surfaces are worn, and which, in devices of the line contact type, cause the pump to leak after the slightest wear on the line.- of contact.

A further object of my invention is to provide a pump in which the use of an ec- I centric mass is substantially eliminated,

thereby reducing vibration and providing a )UlI1)lI1" device havin a )um )in characb h h teristic which is parallel to the characteristic of the piston pump, and has, moreover,

greater eihciency.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claim.

My invention is illustrated .in the accompanying drawings, forming part of this application. in which Figurel is a. side view of the pump, the cover plate being removed,

Figure 2 is a section along the line 22 of Figure 1, the cover plate being in position.

Figure 3 is a view similar to Figure 1, showing the piston in a different position,

Figure 4 is a view similar to Figure 1, showing the piston in another position,

Figure 5 1s a perspective view of the rotor,

The casing has an integral bearing portlon 3 for a shaft 4 of arotor 5. An inlet 6 and an outlet 7 are provided on opposite sides of the casing, these portions being preferably, threaded, as shown at 6. and

7 for convenient attachment to pipes (not shown).

The casing 2, it will be seen, has on the interior thereof a. bearing surface 8 (see Figure 2') against which therotor 5 bears.

Adjacent the inlet and the outlet pipes the casing iscut away to providespaces 9 and 10. The sides of the casing are also cut away along the'side of the rotor, as shown at 11 and 12 respectively, to reducethe frictional contact of the rotor with the bearing surface 7 8.

The rotor 5 is provided with a cylindrical bore 13 extending from one side to the other, the axis of'the bore 13 passing through the center of the rotor. 'The rotor also has an opening 14 extending at right angles to the bore 13 and communicating therewith at its central portion,

In Figure 7 I have shown a piston 15 which is cylindrical in shape, the ends 15- and 15 being curved to conform with the curvature of the rotor, '50 that when the piston is at either end of the bore 13, it will form a continuation of the surface of the rotor. he piston is provided with a cylindrical recess 16 extending inwardly from one side. is toward one end, i. e., the end 15*. Dis- It will be noted that this recess posed within the recess is a cylindrical bushing 17 which is provided with an opening 18 disposed eccentrically thereof and aring 18 in the bushing 17 is' disposed eccentrically with respect to the bushing, the.

bushing 16 being free to turn on the shaft 19 which is rigidly secured to the cover plate 20, the latter being secured to the casing by means of bolts 21.

' Consider Figure 1. In this position the piston 15 has its upper edge 15 in contact with the interior wall of the casing. The lower edge is spaced from the casing. The space 9 which communicates with the inlet, as well as the space 10, is, in the position shown in Figure l. shut off from communication with "the space'between the end of the piston 1 :3" and the lower inner wall of the casing. It, now, there is a movement of the rotor in a clockwise direction, there will he a movement ot' the piston, due to the cocentricity of the opening l8.'t'rom' the posi-' tion shown in .Figure 1 to' that shown in Figure 3 when the rotor has moved 90. ()n further revolution of the rotor. the piston will take the position shown in Figure 4.

Consider now Figure 3. As the rotor moves, the space adjacent to theend 15 will tend to, grow larger, while the space adjacent to the end 15 willtend to grow smaller. The water or other fluid flows into the space, is trapped in the manner shown in Figure 4 and is forced out on the other side through the outlet, 7 due to the reciprocation of the piston as the rotor is turned. It. will be observed that the water cannot return to the inlet at the top, because= the piston is then bearingvagainst the upper inner wall of the casing, nor can it return on the lower side, because the Wall of the rotor will prevent it. There is thus a pumping action which is imparted by the reciprocating piston. It will be observed that this form of the device is a great improvement over those r0- tary pumpsv in which the contact'is a line contact and inwhic-h the slightest wear, on theline contact will cause the pump to leak. The device has the advantages of arotary or packing without departing from the pirit-- 'and the scope of the invention.

I claim: a

In a rotary pump or motor. a casing provided with an inlet on one side and an outlet on the opposite side, a cylindrical rotor disposed within the casing and being arranged to engage certain portions of the walls thereof between the inlet and the outlet, said rotor having a bore extending theret-hrough-and a recess extending at right angles to said bore. a piston disposed in said bore-and having a recess registering With the recess in said rotor, the ends of the piston being-curved to conform withthe contacting surfaceof-the rotor, and means for causing the reciprocation of the piston to trap the fluid from the inlet and to force it through the outlet, said means comprising a stationary member carried by the casing and extending into the recess in said piston, anda rotatable member eccentrically mounted on said stationary member wlthln said recess and arranged to engage the walls of the. recess in said piston.

REUBEN N. TRANE. 

